MkV Chieftain!
At Buckinghamshire Railway Museum, Qurrendon.
(http://i214.photobucket.com/albums/cc94/madlemmey/image_zpsfc689399.jpg) (http://s214.photobucket.com/user/madlemmey/media/image_zpsfc689399.jpg.html)
Hmm, could do with a lick of paint, by the look of it.
Brings back a memory or two :)
The bits bolted on to the front of the turret is an added applique armour called Romor or Stillbrew. It was added from around 1985 to keep them in service longer and operating alonside the Challenger 1.
A pleasant surprise, Will 8)
Now then, WTF were you doing at a train museum? ;) :P
It's only half an hour away, the girls decided they wanted to ride trains today. It were dead good! :)
My Stepson got married there.